Technically, the most current English names for the Kokakos are the, 'Blue-wattled Crow' (for the North Island species), and the, 'Orange-wattled Crow' (for the South Island species). I think that only ancient elderly people would still call the Kokakos by those names, though. The Kokakos actually were included within the Corvidae for a while, but were never placed in the genus, Corvus. Apparently, 'True Bellbird', is a nickname for the North Island (extant) species. Another, much worse, nickname for the North Island species is, 'Monkey of the forest', which refers to its habit of running and jumping through the treetops more often than flying through them. For this reason, the North Island Kokako has also been compared to squirrels.